<form class="form-signin" method="post" action="<?php echo $this->url('/user/login'); ?>" id="user-login">
        <h2 class="form-signin-heading">Please sign in</h2>

        <input type="text" name="username" class="input-block-level" placeholder="Username">
        <input type="password" name="password" class="input-block-level" placeholder="Password">

        <button class="btn btn-large btn-primary" type="submit">Sign in</button>
</form>
